Burkert Type 8620 - Manual (Page 58)

mxCONTROL Type 8620
Page 58
The K-Factor specifies the amount of pulses per volume unit. The K-Factor can specified in different
units - please refer to the "Configuration" section (see below) for the available units.
The setting of the scaling unit determines the unit of the process value. This unit is used at the same
time for the scaling values, the alarm and warning limits of this input and for certain parameters of
associated modules.
Unit Group Measuring units (*)
Flow (flow rate) L/s, L/min, L/h, m3/min, m3/h, Gal/s US, Gal/m US, Gal/h US, gal/s Imp, gal/m Imp,
gal/h Imp, bbl/s US, bbl/m US, bbl/h US, ft3/s, ft3/min, ft3/h, P/s, P/m
(*) If the display does not have sufficient spaces available, only 3 or 6 digits are shown; please refer
to the table in chapter 5.2 for the specific unit abbreviations.
The reference span for the alarm and warning hysteresis of this input as well as for specific
parameters of associated modules (e.g. deadband) are defined by the setting of the low and high
scaling value. Furthermore, the value range of some input parameters and certain module parameters
(e.g. set point) is determined by the low and high scaling value.
Scaling with low and high frequency values
Figure 14: Frequency scaling
with low and high scaling value.
Freq- Low frequency value
Freq+ High frequency value
Scal- ScalDir = Rise: Low scaling value, assigned to the lower frequency value (Freq-)
ScalDir =case: Low scaling value, assigned to upper frequency value (Freq+)
Scal+ ScalDir = Rise: High scaling value, assigned to the upper frequency value (Freq+)
ScalDir =case: High scaling value, assigned to low frequency value (Freq-)
The scaling function assigns a numeric value to the measured frequency that corresponds to the
physical parameter transmitted to the controller by the sensor/transmitter.
For displaying purposes an engineering unit can be assigned to the input. The following table lists the
available units to be selected separately for each frequency input:
The process value is not limited by the low and high scaling value.